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15 lines
342 B
LLVM
15 lines
342 B
LLVM
; RUN: llc < %s -march=x86-64 | FileCheck %s
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@var = external global i64 ; <i64*> [#uses=1]
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define i32 @main() nounwind {
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entry:
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; CHECK: main:
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; CHECK: lock
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; CHECK: decq
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tail call i64 @llvm.atomic.load.sub.i64.p0i64( i64* @var, i64 1 ) ; <i64>:0 [#uses=0]
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unreachable
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}
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declare i64 @llvm.atomic.load.sub.i64.p0i64(i64*, i64) nounwind
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